Delay Repay is a national scheme train companies use to compensate passengers for delays. You can normally claim compensation if you're delayed by 30 minutes or more. The amount of compensation you're entitled to is influenced by the length of the delay, as below.

Delay Repay claims need to be submitted to the rail operator, in the same way as a rail ticket would be claimed for. You'll need to request a refund for the upgrade in a separate claim to your rail tickets and upload a copy of your Seatfrog upgrade receipt.